Across
- 2. Air resistance is a force of the __________ of the atmosphere pushing against an object opposite of the direction that the object travels.
- 3. The speed of a reindeer sleigh could be a __________ variable in an experiment that examines changes in the number of deer pulling the sleigh.
- 6. Santa may have a magic sleigh and reindeer, but even they must deal with air _________ as they travel through the Earth's atmosphere.
- 7. If the peak forces in a collision _______ the elastic limit of an object/material damage will occur to that object.
- 9. While it is still spinning, the total forces acting on a dredel are greater then the force of __________, which would cause it to fall down otherwise.
- 13. When the force applied to an object is greater than its __________ ___________ it will cause permanent deformation.
- 14. A free-body ________ is used to communicate information about the strength and direction of forces acting on an object.
- 19. The amount of sugar in a cookie recipe is an ________ variable that will affect the sweetness of the cookie.
- 20. When everyone sings the Welcome Song at Lumina, _______ is one kind of collision that is very much not allowed by Mr. Barnard.
- 21. The consistent mass of a large holiday elf sitting in a reindeer sleigh would be a good ________ variable in experiment investigating changes in speed to the sleigh and timing of the delivery of presents.
- 22. While a dredel is still spinning on a table, _________ force from the table pushes up against the dredel in the opposite direction of a force that wants to pull it down.
Down
- 1. When a child excited tears apart the paper of a present and throws it all around, the flying pieces of paper have _________ energy because they are in motion.
- 4. 54,000 _____ is the elastic limit of steel. This is the highest amount of force that can be applied to steel where material will still return to its original shape.
- 5. A change in shape due to a force is _____.
- 8. The ________ of santa's reindeer has a greater effect on the kinetic energy of his sleigh than their mass.
- 10. No matter how many cookies Mrs. Clause bakes, the peak forces in a collision between Santa and a tiny elf will always be ________. Even if the elf is running very fast.
- 11. Damage is a synonym for __________ deformation. This is when force applied is so great that it does not return to its original shape after the force is removed.
- 12. Permanent shape change to an object or material is _________.
- 15. When presents are sitting under a tree or on top of a table and not moving, they have _________ energy. This is the energy of their position.
- 16. The maximum forces that occur equally on two ornaments in collision are called ________ forces.
- 17. When an object changes shape due to a force and returns to its original shape after the force is removed this is ___________ deformation.
- 18. Presents falling down a chimney have kinetic energy because they are in ________.
- 20. The jingle of bells is caused by the ________ of two objects, the small hammer inside of the bell and material around it.